Okay, I just went and picked up two fake, half-coconut shells with holes cut in the side, that should be better than the toilet paper tubes. I also picked up screen clips.
So I was just on Amazon and found this:
http://www.amazon.com/R-Zilla-SRZ100...rrarium+screen
My 35 gallon is 36" x 12.5", this is 36-3/8 x 12-3/4...that should be close enough that it will fit and can have screen clips lock it in place. I'm going to order it, if it doesn't fit I will return it. But I'm pretty sure it will fit.
Now I just need to sand the aquarium rims and stand, and then paint it black.